n. [ Cf. F. lupulin. See Lupuline. ] 1. (Chem.) A bitter principle extracted from hops. [ 1913 Webster ]

2. The fine yellow resinous powder found upon the strobiles or fruit of hops, and containing this bitter principle. [ Written also lupuline. ] [ 1913 Webster ]

n. [ NL. lupulus the hop, fr. L. lupus the hop: cf. F. lupuline. ] (Chem.) An alkaloid extracted from hops as a colorless volatile liquid. [ 1913 Webster ]

a. (Chem.) Pertaining to, or obtained from, hops; specifically, designating an acid obtained by the decomposition of lupulin. [ 1913 Webster ]